function EventUtil() {

}

EventUtil.prototype = {
	addHandler: function(element, type,handler) {
		if(element.addEventListener) {
			element.addEventListener(type, handler, false);
		} else if(element.attachEvent) {
			element.attachEvent("on" + type, handler);
		} else {
			element["on" + type] = handler;
		}
	},
	removeHandler: function(element, type, handler) {
		if(element.removeEventListener) {
			element.removeEventListener(type, handler, false);
		} else if(element.detachEvent) {
			element.detachEvent("on" + type, handler);
		} else {
			element["on" + type] = null;
		}
	},

	getEvent: function(event) {
		return event ? event : window.event;
	},
	getTarget: function(event) {
		return event.target || event.srcElement;
	},
	getCommandID: function(event) {
		try {
			if(event.path[2].id) {
				return event.path[2].id;
			}
		} catch(e) {
			throw new Error("获取按钮ID错误");
		}

	},
	preventDefault: function(event) {
		if(event.preventDefault) {
			event.preventDefault();
		} else {
			event.returnValue = false;
		}
	},
	stopPropagation: function(event) {
		if(event.stopPropagation) {
			event.stopPropagation();
		} else {
			event.cancelBubbles = true;
		}
	},
	getRelatedTarget: function(event) {
		if(event.relatedTarger) {
			return event.relatedTarget;
		} else if(event.toElement) {
			return event.toElement;
		} else if(event.fromElement) {
			return event.fromElement;
		} else {
			return null;
		}

	}

}